Best Time to Visit Sarnia: Month-by-Month Guide
Best months for Sarnia: September, August, June, July.
- Best months for Sarnia: September, August, June, July.
- Peak season is July, August, June. Expect higher prices and more visitors (estimated from the climate, not from visitor counts).
- Shoulder season: September. Good weather without the busiest period.
- Wettest months: May, June, July.
- The least pleasant month is January (score 3.8).
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | -1°C | -7°C | 58 mm | 10 | – | – | 3.8 |
| February | 0°C | -6°C | 52 mm | 8 | – | – | 4.0 |
| March | 5°C | -3°C | 56 mm | 10 | – | – | 4.8 |
| April | 12°C | 4°C | 85 mm | 11 | – | – | 6.0 |
| May | 19°C | 10°C | 85 mm | 12 | – | – | 6.9 |
| June | 24°C | 16°C | 87 mm | 11 | – | – | 7.6 |
| July | 27°C | 19°C | 71 mm | 11 | – | – | 7.6 |
| August | 26°C | 18°C | 70 mm | 10 | – | – | 7.7 |
| September | 22°C | 14°C | 72 mm | 9 | – | – | 7.9 |
| October | 15°C | 8°C | 76 mm | 11 | – | – | 6.5 |
| November | 8°C | 2°C | 66 mm | 10 | – | – | 5.5 |
| December | 2°C | -3°C | 56 mm | 10 | – | – | 4.2 |
Frequently asked questions
When is the best time to visit Sarnia?
The best months are September, August, June, July.
When is the rainy season in Sarnia?
The wettest months are May, June, July.